Helmet lens demister

ABSTRACT

The present invention discloses a helmet lens demister, also including the lens (e.g., a snow or wind goggle) if being used independently. The helmet lens demister includes primarily a socket, a power supply device, a fan and fixing devices by which the demister is fixed on a predetermined location for defogging the lens. When defogging, a controller activates the power supply device to produce electricity and drive the fan. Then, the fan produces wind power to cause air convection. Therefore, a temperature in an inner space of the helmet lens will be close to a temperature of ambient environment and a temperature and humidity on an inner side of the lens can be adjusted; therefore, water molecules will not be attached on a side of the lens close to a human body. Moreover, as an entire structure is simple, the socket can be fixed freely, to improve the practicability.

RELATED APPLICATION

This application is a Continuation-In-Part of currently pending U.S.Pat. application Ser. No. 12/612,433 filed on Nov. 4, 2009.

BACKGROUND OF THE INVENTION

a) Field of the Invention

The present invention relates to a demister and more particularly to ahelmet lens demister which utilizes air convection to balance atemperature difference, so as to prevent from attachment of watermolecules.

b) Description of the Prior Art

A motorcycle has already been one of most essential vehicles forshort-ranged transportation of modern people. In order to protect safetyof a rider, a helmet has become one of indispensable safety equipment.Therefore, whether in a sunny or rainy day, the rider has to wear thehelmet to protect his or her safety; and all of the existing helmetswill be attached with a piece of safety lens to keep alien objects fromhitting on the rider's face and eyes upon riding the motorcycle.However, as the lens is covered, a temperature inside the helmet willincrease by hot air which is caused when the rider is breathing. At thistime, when an air temperature and humidity in ambient environment aretoo high and the ambient temperature is lower than the temperatureinside the helmet, water molecules in the air will be very easilyattached on the lens, forming so-called mist. When the mist is producedon the helmet lens, a vision of the rider will be reduced, which willeasily result in an accident. Accordingly, to prevent from forming themist on the lens, a related vendor has provided a solution. Referring toFIG. 1, it shows a schematic view of a state that an anti-fogging filmis coated on a helmet lens in a prior art, wherein a lens 10 of a helmet1 is coated with a layer of anti-fogging film 12 to pave originalcapillary holes on the lens 10, preventing water molecules from beingattached in these capillary holes; therefore, the mist will not beformed. This method can completely prevent the lens 10 from forming themist; however, as this anti-fogging film 12 coating method will failafter a certain period of time, the anti-fogging film 12 has to becoated once after a certain period of time, in order to maintain theanti-fogging effect of the lens 10 of the helmet 1, which will be veryinconvenient to the rider. As a result, there is another vendor who hasutilized heating wires. Referring to FIG. 2, it shows a schematic viewof a state that the heating wires are attached on a helmet lens inanother prior art, wherein a heating wire 22 is provided at a fixedspacing on a lens 20 of a helmet 2. Therefore, when the mist is formedon the lens 20, the heating wires 22 are energized to conduct heatthrough which the lens 20 will not be fogging. In addition, there is noneed to re-configure the heating wires 22 at a fixed time interval. Thisdesign provides a lot of convenience to the rider. Nevertheless, as thismethod of utilizing the heating wires 22 will consume more electricitywhen activating, if a battery is used to supply electricity, power inthe battery will be depleted very quickly and thus the battery has to bereplaced constantly. Therefore, the method of using the heating wireswill very easily cause insufficient electricity.

Accordingly, how to solve the aforementioned issues and shortcoming ofthe prior arts is a direction of research and development forimprovement by the present inventor and related vendors.

SUMMARY OF THE INVENTION

The present invention is a demister and more particularly to a helmetlens demister which utilizes air convection to balance a temperaturedifference and to adjust a temperature and humidity on an inner surfaceof the lens, thereby preventing from attachment of water molecules.

The primary object of the present invention is to provide a helmet lensdemister which includes primarily a socket, a power supply device, a fanand fixing devices by which the demister can be fixed on a predeterminedlocation for defogging the lens. When defogging, a controller can beused to activate the power supply device to produce electricity anddrive the fan. At this time, the fan will produce wind power to form airconvection. As an air convection rate is larger than a flow rate of hotair which is produced when a rider is breathing and a temperature andhumidity on the inner surface of the lens can be adjusted, a temperaturein an inner space of the helmet lens can be close to an ambienttemperature; therefore, water molecules will not be attached on a sideof the lens close to a human body. On the other hand, as an entirestructure is simple, it facilitates the rider to fix the socket at aproper location freely, thereby improving the practicability.

A second object of the present invention is to provide a helmet demisterwhich requires less electricity that there is no need to replace thebattery constantly.

A third object of the present invention is to provide a helmet demister,an entire structure of which is simple and compact that the rider caneasily carry.

A fourth object of the present invention is to provide a helmetdemister, wherein as an entire structure is simple, a manufacturing costis cheap to reduce a sale price.

A fifth object of the present invention is to provide a helmet demister,wherein as an air flow rate is more than three times of a respirationrate, a helmet lens can be quickly defogged and can be kept fromfogging.

To enable a further understanding of the said objectives and thetechnological methods of the invention herein, the brief description ofthe drawings below is followed by the detailed description of thepreferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a schematic view of a state that an anti-fogging film iscoated on a helmet lens in a prior art.

FIG. 2 shows a schematic view of a state that heating wires are attachedon a helmet lens in another prior art.

FIG. 3 shows a three-dimensional schematic view of a demister of thepresent invention.

FIG. 4 shows an exploded view of the demister of the present invention.

FIG. 5 shows a schematic view of an operation to activate the demisterof the present invention.

FIG. 6 shows a schematic view of a state that air flow is produced afteractivating the demister, according to the present invention.

FIG. 7 shows a schematic view of structures of another preferredembodiment of the present invention.

FIG. 8 shows a schematic view of a state of use of FIG. 7.

FIG. 9 shows a schematic view of structures of another preferredembodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIG. 3 and FIG. 4, it shows a three-dimensional schematicview and an exploded view, of a demister of the present invention. Asshown in the drawings, the present invention is a helmet lens demister.The demister 3 comprises primarily a socket 30, a power supply device32, a fan 34 and fixing devices 36 by which the demister 3 can be fixedon a predetermined location for defogging a lens 40 of a helmet 4. Inaddition, the socket 30 is provided with a controller 38 to activate thepower supply device 32 to produce electricity and drive the fan 34. Atthis time, the fan 34 will produce wind power to cause air convection.As this air convection rate is larger than a flow rate of hot air whichis formed when a rider is breathing, a temperature in an inner space ofthe lens 40 of the helmet 4 can be maintained at being close to atemperature of ambient environment; therefore, water molecules will notbe attached on a side of the lens 40 where the temperature is lower.Besides, a location of the socket 30 where the fan 34 is provided istransfixed with a vent 39 which is connected to an air pipe 5 allowingexternal air to flow through.

Referring to FIG. 5 and FIG. 6, it shows a schematic view of anoperation to activate the demister and a schematic view of a state thatair flow is produced after activating the demister, according to thepresent invention. As shown in the drawings, the power supply device 32is a battery and this method facilitates carrying the demister 3 andprovides for supplying power by itself. Using the fixing devices 36, thedemister 3 can be fixed at any location on the inner surface of the lens40 and the helmet 4. In addition, the fan 34 is made to face toward thelens 40. At this time, the controller 38 is pressed down to activate thepower supply device 32, producing electricity and driving the fan 34.The fan 34 will then circulate external air through the vent 39. As anair convection rate is larger than a flow rate of hot air which isformed when the rider is breathing, heat energy which is produced whenthe rider is breathing will be carried away by the air convection,allowing a temperature in a space of the lens 40 corresponding to therider to be close to a temperature in ambient environment and humidityto be adjusted; therefore, water molecules on the inner side of the lens40 will not be able to be attached on the lens 40, and no fogging willbe formed. In addition, as the entire structure is simple, a rider canbe convenient in fixing helmet lens demister at a proper locationfreely, thereby improving practicability.

Referring to FIG. 7 and FIG. 8, it shows a schematic view of structuresof another preferred embodiment of the present invention, and aschematic view of a state of use of FIG. 7. As shown in the drawings, apower supply device 32 a is an external circuit which is a primary powersource and as the installation method has been disclosed in FIG. 6,further description is not needed. If a vent 39 a on a demister 3 acannot circulate the external air, then an air pipe 5 a and the vent 39a can be used and the other end of the air pipe 5 a is provided in anambient space. Thus, a fan 34 a can be effectively driven to circulatecold air in the ambient environment, thereby reducing a temperature atan inner side of lens 40 a and adjusting the humidity. Besides, by usingthe externally connected power supply device 32 a, there is no need toreplace a battery that a rotation speed of the fan 34 a can be stillmaintained, allowing the defogging function to be more stable.

Referring to FIG. 9, it shows a schematic view of structures of anotherpreferred embodiment of the present invention. As shown in the drawing,a demister 3 b is applied in a full-face helmet and is assembled on apredetermined location of the helmet to achieve a defogging effect for alens. As its operation method and air flow condition are the same asthose described above, no further disclosure is needed. By thisinstallation method, it can be clearly shown that the it is notnecessary to install the demister 3 b on the lens, as long as that fogon the lens can be removed.

It is of course to be understood that the embodiments described hereinis merely illustrative of the principles of the invention and that awide variety of modifications thereto may be effected by persons skilledin the art without departing from the spirit and scope of the inventionas set forth in the following claims.

1. A helmet lens demister comprising: a socket, predetermined locationsof which are provided with at least one fixing device; at least onepower supply device which is connected at the socket and is electricallyconnected with a controller; and at least one fan which is connected ata pre-determined location of the socket and is electrically connectedwith the power supply device.
 2. The helmet lens demister according toclaim 1, wherein a location of the socket where the fan is provided istransfixed with a vent which is connected to an air pipe, allowingexternal air to flow through.
 3. The helmet lens demister according toclaim 1, wherein an air flow rate which is caused after an operation ofthe fan is larger than a respiration rate.
 4. The helmet lens demisteraccording to claim 1, wherein the power supply device is an externalcircuit.
 5. The helmet lens demister according to claim 1, wherein thepower supply device is a battery or solar energy.
 6. The helmet lensdemister according to claim 1, wherein the lens is further a snow goggleor a wind goggle, which is used independently.